Description : Which gas is used for converting vegetable oils into saturated fats? (1) H2 (2) O2 (3) Cl2 (4) SO2
Last Answer : (1) H2 Explanation: Hydrogenation - to treat with hydrogen - is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst. ... oils are derived from polyunsaturated fatty acids (containing more than one carbon-carbon double bonds).
Description : What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell? (A) Cl2 & Na (B) Cl2 & H2 (C) O2 & H2 (D) Cl2 , H2 & NaOH solution
Last Answer : (D) Cl2 , H2 & NaOH solution
Description : Which of the following has the highest bond order? (1) N2 (2) O2 (3) Cl2 (4) H2
Last Answer : (1) N2 Explanation: A high bond order indicates more attraction between electrons. A higher bond order also means that the atoms are held together more tightly.
Description : What of the following reactions demonstrates a synthesis reaction A) Mg plus H2SO4 and gt MgSO4 plus H2 B) 2NaCl and gt 2Na plus Cl2 C) C plus O2 and gt CO2 D) Zn plus 2HCl and gt ZnCl2 plus H2?
Last Answer : C+O2 →CO2
Description : The process of converting liquid oil into solids saturated fats by passing hydrogen gas is
Last Answer : called hydrogenation.
Description : Which of the following statements is not true about triacylglycerols? (a) When solids and semisolids at room temperature, they are called fats. (b) When liquids at room temperature, they are ... low melting points are composed of saturated fatty acids, causing them to be liquids at room temperature
Last Answer : Triacylglycerols with low melting points are composed of saturated fatty acids, causing them to be liquids at room temperature
Description : Glycerine and what other substance are made by heatin animal fats or vegetable oils with sodium hydroxide?
Last Answer : ANSWER: SOAP
Description : Consider the following statements: 1. Mercury metal exists as a liquid at room temperature. 2. The property of metals by which they can be beaten into thin sheets is called malleability 3. Neutral fats such as butter and vegetable oils ... b) 1, 3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only
Last Answer : Ans:(d)
Description : Drying oils contain a fairly large proportion of – (1) fats (2) proteins (3) saturated fatty acids (4) unsaturated fatty acids
Last Answer : (4) unsaturated fatty acids Explanation: They contain a high percentage of "polyunsaturates" (polyunsaturated fatty acids). Most drying oils owe their drying properties to the presence of a large percentage of linolenic acid (which derives its name from "linseed"), which is highly unsaturated.
Description : Drying oils contain a fairly large proportion of (1) fats (2) proteins (3) saturated fatty acids (4) unsaturated fatty acids
Last Answer : unsaturated fatty acids
Description : Oils and fats are obtained from (a) Animal sources (b) Vegetable sources (c) Synthesis (d) Both animal and vegetable sources
Description : Which one of the following forms the base of vegetable fibres? (1) Cellulose (2) Proteins (3) Fats (4) Oils
Last Answer : (1) Cellulose Explanation: The principal chemical component of vegetable fibers is cellulose, with varying amounts of lignin and hemicelluloses also usually present; thus, the fibers are also ... bagasse, and banana. Vegetable fibers are usually stiffer but less tough than synthetic fibers.
Description : The basic difference between vegetable oils and fats is in their (A) Density (B) Chemical properties (C) Physical state (D) Composition
Last Answer : (C) Physical state
Description : Vegetable oils and fats basically differ in their (A) Density ranges (B) Physical state (C) Chemical composition (D) Chemical properties
Last Answer : (B) Physical state
Last Answer : Cellulose
Description : Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil. (A) Drying (B) Semi-drying (C) Non-drying (D) None of these
Last Answer : (C) Non-drying
Description : Azo (pron: A-zo) Compounds characteristically are compounds containing the group: w) C2 x) N2 y) O2 z) Cl2
Last Answer : ANSWER: X -- N2 (N = N)
Description : . Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water. (A) SO3 (B) Cl2 (C) NH3 (D) SO2
Last Answer : (B) Cl2
Description : LPG (Household cooking gas) is mainly a mixture of (a) Methane + Ethane (b) Acetylene + O2 (c) Butane + Isobutane (d) Acetylene + H2
Last Answer : Butane + Isobutane
Description : Sulphuric acid is used as a catalyst in the (A) Hydrogenation of oils (B) Gas phase oxidation of SO2 in chamber process (C) Alkylation of hydrocarbons (D) None of these
Last Answer : (C) Alkylation of hydrocarbons
Description : Supersonic jet causes pollution by thinning of - (1) O3 layer (2) O2 layer (3) SO2 layer (4) CO2 layer
Last Answer : (1) O3 layer Explanation: Three forms (or allotropes) of oxygen are involved in the ozone-oxygen cycle: oxygen atoms (O or atomic oxygen), oxygen has (O2 or diatomic oxygen), and ... oxygen radicals. The atomic oxygen radicals then combine with separate O2 molecules to create two O3 molecules.
Description : Supersonic jet causes pollution by thinning of (1) O3 layer (2) O2 layer (3) SO2 layer (4) CO2 layer
Last Answer : O3 layer
Description : The catalyst used in hydrogenation of oils is - (1) Fe (2) V2O5 (3) Ni (4) O2
Last Answer : (3) Ni Explanation: The catalyst used in hydrogenation of oils is nickel. It is used to speed up the reaction. Vegetable oils convert into vanaspati after hydrogenation.
Description : Aerated water contains (1) SO2 (2) NO2 (3) H2 (4) CO2
Last Answer : CO2
Description : Major gaseous pollutant of the thermal power station is (1) H2 S (2) NH3 (3) NO2 (4) SO2
Last Answer : SO2
Description : When conc. H2 SO4 is added to dry KNO3 , brown fumes are evolved. These fumes are due to (1) SO3 (2) SO2 (3) NO2 (4) N2O
Last Answer : NO2
Description : Chemically fats and oils are: (1) Triesters (2) Amines (3) Aldehydes (4) Ketons
Last Answer : (1) Triesters Explanation: Fats and oils are called triglycerides (or triacylcylgerols) because they are esters composed of three fatty acid units joined to glycerol, a trihydroxy alcohol. Fats and oils are composed of molecules known as triglycerides, which are esters.
Description : Which of the following compounds will not be classified as lipids? (a) Fats (b) Waxes (c) Soaps (d) Oils
Last Answer : Waxes
Description : Alkaline hydrolysis of oils (or fats) is called : (a) Saponification (b) Fermentation (c) Diazotization (d) Rancidification
Last Answer : Saponification
Description : Liquid oils can be converted to solid fats by (a) Hydrogenation (b) Saponification (c) Hydrolysis (d) Oxidation of double bonds
Last Answer : Hydrogenation
Description : Fats and oils are (a) monoesters of glycerol (b) diesters of glycerol (c) triesters of glycerol (d) diesters of glycol
Last Answer : triesters of glycerol
Description : One of the following is NOT a lipid. Is it: w) fats and oils x) starches y) steroids z) waxes
Last Answer : ANSWER: X -- STARCHES
Description : Main constituents of purified Lurgi gas are (A) H2 , CmHn & CO2 (B) CO, H2 & CH4 (C) CO2 , O2 & CO (D) N2 , H2 & CO2
Last Answer : (B) CO, H2 & CH4
Description : L.D. converter gas (produced in steel plant) comprises mainly of (A) CO (upto 65%) & CO2 (B) CO2 & H2 (C) CO & O2 (D) CO2 & O2
Last Answer : (A) CO (upto 65%) & CO2
Description : The essential ingredient of all the synthesis gas is (A) H2 (B) O2 (C) CO2 (D) N2
Last Answer : (A) H
Description : Which of the following behaves most closely like an ideal gas? (A) He (B) N2 (C) O2 (D) H2
Last Answer : (A) He
Description : The lightest non-inflammable gas is (A) H2 (B) He (C) Ar (D) O2
Last Answer : Option B
Description : Water gas is a mixture of (A) CO2 and O2 (B) O2 and H2 (C) H2, N2 and O2 (D) CO, N2 and H2.
Last Answer : CO, N2 and H2.
Description : (a) What are fuel cells? Explain the electrode reactions involved in the working of H2 – O2 fuel cell. (b) Represent the galvanic cell in which the reaction Zn (s) + Cu2+ (aq) → Zn2+ (aq) + Cu (s) takes place. -Chemistry
Last Answer : (a) Fuel cells : These cells are the devices which convert the energy produced during combustion of fuels like H2, CH4, etc. directly into electrical energy. The electrode reaction for H2 – O2 fuel cell : (b) The galvanic cell may be represented as Zn (s) | Zn2+ (1M) || Cu2+ (1M) | Cu (s)
Description : Which of the following gases makes bread or cake rise making them soft and spongy? (1) CO (2) H2 (3) CO2 (4) O2
Last Answer : (3) CO2 Explanation: Breads rise due to the process of fermentation, a chemical process by which molecules such as glucose are broken down an aerobically.
Description : The conjugate acid of water is: w) OHx) H2 y) O2 z) H3O+
Last Answer : ANSWER: Z -- H3O+
Description : Which of the following gases will effuse out of football bladder most quickly ? (1) He (2) H2 (3) N2 (4) O2
Last Answer : H2
Description : Which one of the following vegetable oils is used in the manufacture of paints? (1) Palm oil (2) Sunflower oil (3) Linseed oil (4) Cottonseed oil
Last Answer : (4) Cottonseed oil Explanation: Linseed oil and castor oils are used mainly as drying agents in paints and varnishes. Linseed oil is generally used in the manufacture of oil paints, drying oil finish ... , as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
Description : Which of the following vegetable oils does not contain essential fatty acids? (1) Sunflower oil (2) Mustard oil (3) Coconut oil (4) Gmundnut oil
Last Answer : (1) Sunflower oil Explanation: Fatty Acids are aliphatic carboxylic acid with varying hydrocarbon lengths at one end of the chain joined to terminal carboxyl (-COOH) group at the other end.
Description : Partial hydrogenation of vegetable oils in the presence of Ni catalyst at 200°C gives (a) Vanaspati ghee (b) Margarine (c) Both of these (d) None of these
Last Answer : Vanaspati ghee
Last Answer : Linseed oil
Description : Which of the following vegetable oils does not contain essential fatty acids ? (1) Sunflower oil (2) Mustard oil (3) Coconut oil (4)Groundnut oil
Last Answer : Sunflower oil
Description : What number of moles of O2 is required to react with 3.6 mol SO2 in the following reaction 2S02 plus O2 2SO3?
Last Answer : 1,8 of moles of O2 are required.
Description : What the answer for FeS2 plus O2 - and get Fe2O3 plus SO2?
Last Answer : FeS + 7 O2 = 2 Fe2O3 + 4 SO2